Canada



May 30, 1933. G. M. LEASH 1,911,628

FENCE GAUGE FOR SAWS Filed Sept. 19, 1932 INVEN TOR GEORGE MER DA [EA SH By M;

AT ORNEYS Patented May 3%, 1933 UNHTED STTES' arar oFFw GEORGE MERIDA LEASE, OF NEH/V VIESTMINSTERyBRIT ISII COLUMBIA, CANADA 7 FENCE GAUGE FOR SAWS Application filed September 19, 1932. Serial-No. 633,762.

cut exactly to the desired dimension; to provide means whereby clogging of the fence by sawdust and the like is prevented, and to provide means for accurately adjusting the fence to compensate for the changing of saws Where one saw is set thicker than another.

The invention consists essentially of an A frame, one leg of which is adapted to be hingedly connected to the bed of the machine to one side of the cutting element, the other leg serving as a fence and being adapted to bear upon the bed and to be moved towards or from the cutting element, and means for adjusting the position of the fence, as will be more fully described in the following specification and shown in the accompanying drawing, in which Fig. 1 is a front elevational view of the inventioninounted upon the bed of a circular saw.

Fig. 2 is an end elevational view.

Fig. 3 is a fragmentary perspective view of the fence as seen from the underside.

Fig. 4 is a front elevational view of a modification.

In the drawing like characters of reference indicate corresponding parts in each figure.

.The'numeral 1 indicates the bed of a saw frame through which the upper periphery of a circular saw 2 extends in the usual manner. Mounted adjacent the edge of the bed and parallel to the saw is a foot 3 forming a fixed part of an A frame generally indicated by the numeral 4.

The A frame consists of a pair of legs 5 and 6 which are pivotally connected together at the apeis of the frame with a pin 7. Hingedly connected to the base of the leg 6 isa foot or fence 8 which is preferably of L-section, the vertical portion 9 of which forms an abutment for the outer side of the material to cut, the underside of the horizontal portion 10 of the foot is provided with shallow transverse ribs 11, see Figure 3, which bear upon the bed 1 and permit the foot to slide freely thereover and also prevent the accumulation of sawdust against the fence which might prevent the article to be cut from making a proper contact therewith and cause it, in consequence, to be of lesser width after passing the saw than that desired.

Trunnioned bearings 12 and 18 are mounted intermediate the height of the legs 5 and 6 respectively, the former 12 being internally threaded to receive a coarse pitch screw 14 against endwise movement in any desired manner. Secured upon the screw is a disc generally indicated by the numeral 15 which is subdivided. by lines or colours into equal segments 16, which in the present instance represent quarters of an inch of the lead of the screw thread. so that in the device here i1? lustrated one complete turn of the disc 15 will move the bearing 12 one inch and the fence 9, which is exactly twice the distance from the hinge pin 7, two inches. Each segment is still further subdivided by rows of orifices 17-, 18 and 19 which are obviously equally spaced around the disc.

Extending outwardly from the bearing 12 9 is a graduated scale 20 which is subdivided in this instance in representations of inch movements of the fence 9 and mounted upon the free end of the screw 14 is a collar 21, the end of which serves to read upon the scale and show approximately, the number of inches the fence is away from the saw.

Swingingly mounted'on the screw 14: between the disc 15 and the bearing 13 is a collar 22 provided at diametrically opposite which is journalled in the latter 13 .and held points with a spring lever 23 and an arm 24 having a cam shaped extremity 24A, the lever is provided with a handle 25 at its outer end and a hooked finger 26 adjacent the handle which is adapted to be sprung into any of the orifices of the row 17, so that the disc 15 may be turned to any desired position by the handle, the arm 24 is adapted to be brought into engagement with a stop screw 27 which is adjustably carried from a lug 28 on the leg 5 of the A frame.

In the modification shown in Figure 4, which will be the preferred structure in all cases where extensive movement of the fence is required, both bearings 12 and 13 are internally threaded and the screw shaft 14 is provided with right and left hand threads 29 and 30 which engage the bearings 12 and 13 respectively, so that whenever the screw shaft is turned the disc 15 remains in a substantially central position between the legs 5 and 6.

bviously in a structure employing both right and left threads on the screw shaft, a relatively quick adjustment of the fence can be obtained without having recourse to the use of coarse threads on the screw shaft.

In setting the fence at a predetermined distance from the saw, the handle 25 is held over to the left as viewed from Figure 1 until the hooked finger 26 is removed from engagement withthe disc 15. The disc is then turned until the collar 21 indicates approximately on the scale 20 the spacing required, the handle is then moved upwards until the finger is opposite the orifice in the row 17 which corre sponds to the fractional dimension desired and is then moved to the right to allow the finger to enter said orifice, the handle is then moved in a downward direction until the arm 24 engages the stop screw 27, which will cause the screw 14 to be rotated and the fence to move to the exact distance required.

If frequent changes of set are required, plugs may be inserted in appropriate orifices of the rows 18 and 19 to indicate the corresponding orifices in the row 17 in which engagement of the disc is to be made.

It will be obvious that when a saw having a narrow set is mounted on the saw arbor in place of one with a broad set, that the distance from the right side edge of the saw to the fence will be greater than formerly, and in order to correct this distance, it is merely necessary to turn the stop screw 27 in the proper direction to correct the spacing.

The spreading of the legs 5 and 6 cause the lowering of the screw shaft 14 towards the bed of the saw frame and a proportionate increase in the lowering of the lug 28 and the point of the stop screw 27 or a decrease of the vertical distance between these two elements and in order to provide for .the arm 24 to be brought to rest at the same angle from the horizontal irrespective of the spreading of the legs, the extremity 24A of the arm 24 is appropriately curved substantially as shown, thus enabling the stop screw to make contact at any point along said curve according to the vertical distance between the screw shaft and the stop screw and ensuring accurate setting of the fence at any desired position.

It will also be obvious that the stop screw 27 can be dispensed with and the stop position of the disc be determined when the handle 25 is at rest on the bed 1 of the saw frame.

It will be understood that the device is capable of embodiment in other forms without departing from the spirit of the invention except as hereinafter claimed.

l/Vhat I claim as my invention is:

1. A fence gauge for saw frames and the like comprising a pair of hingedly connected legs, a member at the base of one leg adapted to be secured to the bed of the saw frame to one side of the saw and a fence at the base of the other leg adapted to slidably engage the bed of the frame, a screw connecting the legs together whereby the rotation of the screw spreads or draws together the legs and imparts sliding movement to the fence, a disc 9 concentrically secured upon the screw, said disc being subdivided at predetermined intervals of its periphery, a lever freely fulcrumed about the screw, means upon the lever for engaging the disc at said predetermined intervals as selected to turn it, and means for stopping the turning movement of the screw in one direction at a selected position.

2. A fence gauge for saw frames and the like comprising a pair of hingedly connected legs, a member at the base of one leg adapted to be secured to the bed of the saw frame to one side of the saw and a fence at the base of the other leg adapted to slidably engage the bed of the frame, ascrew connecting the legs together whereby the rotation of the screw spreads or draws together the legs and imparts sliding movement to the fence, a disc concentrically secured upon the screw, said disc being subdivided by orifices spaced at intervals to represent units of measurement of movement of the fence with respect to the member, a lever freely mounted to swing about the screw, means for connecting the lever to the disc at some of said orifices and a stop for limiting the movement of the lever in one direction.

3. A fence gauge for saw frames and the like comprising a pair of hingedly connected legs, a member at the base of one leg adapted to be secured to the bed of the saw frame'to one side of the saw and a fence at the base of the other leg adapted to slidably engage the bed of the frame, a screw connecting the legs together whereby the rotation of the screw spreads or draws together the legs and imparts sliding movement to the fence, 2. disc concentrically secured upon the screw, said disc being subdivided by orifices spaced at intervals to represent units of measurement of movement of the fence with respect to the member, a lever freely mounted to swing about the screw, means for connecting the lever to the disc at some of said orifices and a stop for limiting the movement of the lever in one direction, and means for adjusting the position of the stop.

4:. A fence gauge for saw frames and the like comprising a pair of hingedly connected legs, a member at the base of one leg adapted to be secured to the bed of the saw frame to one side of the saw and a fence at the base of the other leg adapted to slidably engage the bed of the frame, a screw connecting the legs together whereby the rotation of the screw spreads or draws together the legs and imparts sliding movement to the fence, a disc concentrically secured upon the screw, said disc bein subdivided at predetermined intervals 0 its periphery, a lever freely fulcrumed about the screw, means upon the lever for engaging the disc at said predetermined intervals as selected to turn it, and means for stopping the turning movement of the screw in one direction at a selected position, said screw having a right and left hand thread with the disc mounted intermediate the said threads whereby the disc follows in rotation the same direction as the fence.

Dated at Vancouver, B. C., this 19th day of August, 1932.

GEORGE MERIDA LEASH. 

